CN112372526A - Positioning device for center of large-diameter cylinder and using method thereof - Google Patents
Positioning device for center of large-diameter cylinder and using method thereof Download PDFInfo
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- CN112372526A CN112372526A CN202010995405.9A CN202010995405A CN112372526A CN 112372526 A CN112372526 A CN 112372526A CN 202010995405 A CN202010995405 A CN 202010995405A CN 112372526 A CN112372526 A CN 112372526A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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Abstract
The application relates to a positioning device for the center of a large-diameter cylinder and a using method thereof, relating to the technical field of mechanical measurement, wherein the positioning device comprises a connecting rod mechanism, a first light source component, two second light source components and an adjusting mechanism, the connecting rod mechanism comprises a first rod piece, a base and two second rod pieces, and the base is arranged in parallel to the first rod piece; two ends of the second rod piece are respectively rotatably connected with the base and the first rod piece, and included angles between the two second rod pieces and the base are equal; the first light source component is used for projecting light along the connecting line direction of the first rod piece and the midpoint of the base; the two second light source components are respectively arranged on the two second rod pieces and are used for projecting light rays along the axial direction of the second rod pieces; the adjusting mechanism is used for adjusting an included angle between the second rod piece and the base, so that a plane formed by the light rays projected by the two second light source assemblies is parallel to the end face of the cylinder to be measured, and the light rays projected by the two second light source assemblies are tangent to the cylindrical surface of the cylinder to be measured.
Description
Technical Field
The application relates to the technical field of mechanical measurement, in particular to a positioning device for the center of a large-diameter cylinder and a using method thereof.
Background
The traditional pipe fitting circle center measuring and positioning mode is that three points are measured at the outer edge of a pipe fitting through a total station, then the coordinate position of the circle center of the pipe fitting is calculated through the spatial position relation of the three measuring points, and the measuring mode needs to analyze and calculate data after multiple times of measurement, so that the time consumption is long, and the data precision cannot be guaranteed. And the requirement for quickly assembling the hoisted pipe fitting cannot be met, and the accuracy of assembly can be influenced due to the fact that the precision cannot be guaranteed, and great difficulty is brought to pipe fitting assembly.
In the correlation technique, the instrument of measuring the centre of a circle adopts the scissors formula link mechanism of central symmetry, is provided with four on scissors formula link mechanism's the outside connecting rod and supports to lean on the piece for support and lean on the pipe fitting that awaits measuring, through the extension and the shrink of scissors formula link mechanism relative its center, make four support and lean on the piece and support and lean on the excircle surface of the pipe fitting that awaits measuring everywhere, from this, can confirm the pipe fitting centre of a circle by scissors formula link mechanism's mark target mechanism.
However, the measuring tool of the contact type connecting rod structure is easy to deform and wear, and the top end of the abutting part needs to abut against the flange of the pipe fitting, so that when the large-size pipe fitting is measured, the required length of the abutting part is large, the verticality of the abutting part cannot be ensured, and the problem that the circle center of the pipe fitting is measured inaccurately is caused.
Disclosure of Invention
The embodiment of the application provides a positioning device for the center of a large-diameter cylinder and a use method thereof, and aims to solve the problem that in the related art, because the top end of an abutting part needs to abut against a flange of a pipe fitting, when a large-size pipe fitting is measured, the required length of the abutting part is large, the verticality of the abutting part cannot be ensured, and the measurement of the circle center of the pipe fitting is inaccurate.
In a first aspect, there is provided a positioning device for the center of a large diameter cylinder, comprising:
a linkage mechanism, comprising:
-a first bar;
-a base arranged parallel to said first bar;
two second rod pieces, wherein two ends of each second rod piece are respectively rotatably connected with the base and the first rod piece, and included angles between the two second rod pieces and the base are equal;
the first light source component is used for projecting light rays along the connecting line direction of the first rod piece and the midpoint of the base;
the two second light source assemblies are respectively arranged on the two second rod pieces and are used for projecting light rays along the axial direction of the second rod pieces;
and the adjusting mechanism is assembled on the connecting rod mechanism and used for adjusting an included angle between the second rod piece and the base so as to enable a plane formed by the light rays projected by the two second light source assemblies to be parallel to the end surface of the cylinder to be detected, and the light rays projected by the two second light source assemblies are tangent to the cylindrical surface of the cylinder to be detected.
In some embodiments:
the first light source assembly comprises a first light source;
the second light source assembly comprises a second light source which is positioned below the first light source.
In some embodiments:
the first light source assembly comprises a first light source;
the second light source assembly comprises two second light sources which are arranged up and down; the light rays projected by the two second light sources are circumscribed, and the projected light rays of the first light source and the two second light sources positioned above the first light source are positioned in the same plane.
In some embodiments, the second light source assembly further includes a third light source disposed away from the first light source, the third light source is circumscribed with the light projected by the second light source located below, and all the light projected by the third light source and the light projected by the second light source located below are located in the same plane.
In some embodiments, the first light source assembly further comprises a fourth light source positioned below the first light source; the fourth light source is circumscribed with the light projected by the first light source, and the projected light of the fourth light source and the two second light sources positioned below are positioned in the same plane.
In some embodiments, the second rod is connected to the first rod by a connecting rod.
In some embodiments:
the middle of the first rod piece is provided with a mounting hole; the middle of the base is provided with a threaded hole;
the adjusting mechanism is a screw rod, one end of the screw rod is rotatably arranged in the mounting hole, and the other end of the screw rod is screwed in the threaded hole and is used for pushing the base to move on the screw rod.
In some embodiments, the positioning device further comprises an adjustment bracket, the adjustment bracket comprising:
a sleeve;
one end of the movable rod is connected with the connecting rod mechanism, and the other end of the movable rod extends into the sleeve and can rotate in the sleeve;
and the fastening piece is inserted into the sleeve and abuts against the movable rod.
In some embodiments, the first light source assembly is disposed on the first rod or the base.
In a second aspect, there is provided a method for using the above positioning device for the center of a large-diameter cylinder, which includes the following steps:
adjusting an included angle between the second rod and the base so that a plane where light rays projected by the two second light source assemblies are located is parallel to the end face of the cylinder to be detected, and the light rays projected by the two second light source assemblies are tangent to the cylindrical surface of the cylinder to be detected;
adjusting the height of the link mechanism to enable the light projected by the first light source assembly to pass through the end face of the cylinder to be detected;
marking the light projected by the first light source assembly on the end face of the cylinder to be detected;
and moving the positioning device, repeating the steps, and taking the intersection point of the rays projected by the first light source assembly marked twice as the circle center of the end surface of the cylinder to be measured.
The beneficial effect that technical scheme that this application provided brought includes: the positioning device of the embodiment of the application does not need to contact with the cylinder to be measured, reduces deformation and abrasion of the positioning device, can quickly determine the end face circle center of the large-diameter cylinder, is simple to operate, is high in accuracy, and greatly improves the process efficiency and accuracy of determining the end face circle center of the large-diameter cylinder.
The embodiment of the application provides a positioning device for the center of a large-diameter cylinder and a using method thereof, because the included angles between the light rays projected by the two second light source components and the light rays projected by the first light source component are equal, when the plane formed by the light rays projected by the two second light source components is parallel to the end surface of the cylinder to be measured, it is stated that there is no included angle between the light projected by the first light source module and the end surface of the cylinder to be measured, when the light rays projected by the two second light source components are tangent to the cylindrical surface of the cylinder to be measured, the light rays projected by the first light source components vertically penetrate through the axial line of the cylinder to be measured, the height of the positioning device can be adjusted, so that the light projected by the first light source component forms a finished circular light spot on the white board, and the light projected by the first light source component passes through the circle center of the end face of the cylinder to be measured. The two positioning devices can be used for simultaneously measuring the center of the cylinder to be measured, so that the intersection point of the light rays projected by the first light source components of the two positioning devices is the center of a circle of the end face of the cylinder to be measured; or the positioning device can be moved, so that the intersection point of the light rays projected by the first light source assembly obtained twice is the center of the circle of the end face of the cylinder to be measured. Therefore, the positioning device of the embodiment of the application does not need to be in contact with the cylinder to be measured, deformation and abrasion of the positioning device are reduced, the center of the end face circle of the large-diameter cylinder can be quickly determined, the operation is simple, the accuracy is high, and the process efficiency and the accuracy of determining the center of the end face circle of the large-diameter cylinder are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a positioning device for the center of a large-diameter cylinder according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a linkage mechanism provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of an adjustment bracket provided in an embodiment of the present application;
fig. 4 is a layout view of a first light source assembly and a second light source assembly according to embodiment 2 of the present application;
fig. 5 is a layout view of a first light source assembly and a second light source assembly according to embodiment 3 of the present application;
fig. 6 is a layout view of a first light source assembly and a second light source assembly according to embodiment 4 of the present application;
FIG. 7 is a schematic diagram illustrating relative positions of light beams projected by the first and second light source assemblies and a cylinder to be measured;
fig. 8 is a schematic view illustrating a use state of a positioning device according to an embodiment of the present application;
fig. 9 is a top view of fig. 8.
In the figure: 1. a link mechanism; 10. a first bar member; 11. a second bar member; 12. a connecting rod; 13. a base; 2. a cylinder to be tested; 3. a first light source assembly; 30. a first light source; 31. a fourth light source; 4. a second light source assembly; 40. a second light source; 41. a third light source; 5. an adjustment mechanism; 6. adjusting the bracket; 60. a sleeve; 61. a movable rod; 62. a fastener.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1:
referring to fig. 1 to 3, embodiment 1 of the present application provides a positioning device for the center of a large-diameter cylinder, which includes a link mechanism 1, where the link mechanism 1 includes a first rod 10, a base 13, and two second rods 11, and the base 13 is disposed parallel to the first rod 10; the two ends of the second rod 11 are rotatably connected to the base 13 and the first rod 10, and the included angles between the two second rods 11 and the base 13 are equal, so the included angles between the two second rods 11 and the first rod 10 are also equal.
The positioning device in embodiment 1 of the present application further includes a first light source assembly 3, two second light source assemblies 4 and an adjusting mechanism 5, and light rays projected by the first light source assembly 3 and the two second light source assemblies 4 are both laser light. The first light source assembly 3 is used for projecting light along a connecting line of the first rod 10 and the midpoint of the base 13; the two second light source assemblies 4 are respectively arranged on the two second rod pieces 11, and the second light source assemblies 4 are used for projecting light rays along the axial direction of the second rod pieces 11; because the included angles between the two second bars 11 and the base 13 are equal, and the included angles between the two second bars 11 and the first bar 10 are also equal, the included angles between the light rays projected by the two second light source assemblies 4 and the light rays projected by the first light source assembly 3 are also equal. The adjusting mechanism 5 is disposed on the link mechanism 1 and is configured to adjust an included angle between the second rod 11 and the base 13, so that a plane formed by the light beams projected by the two second light source assemblies 4 is parallel to the end surface of the cylinder 2 to be measured, and the light beams projected by the two second light source assemblies 4 are tangent to the cylindrical surface of the cylinder 2 to be measured.
In example 1 of the present application: the fact that the light rays projected by the two second light source assemblies 4 are tangent to the cylindrical surface of the cylinder 2 to be measured means that: when the positioning device in embodiment 1 of the present application is used to measure the center of the cylinder 2 to be measured, a white board is used to receive the light projected by the first light source assembly 3 and the second light source assembly 4, the outline of the light spot formed by the light projected by the first light source assembly 3 and the second light source assembly 4 on the white board is approximately circular, the light projected by the two second light source assemblies 4 is blocked by the cylinder 2 to be measured completely, the light spot cannot be formed on the white board, and when the complete circular light spot is formed gradually, it is stated that the light projected by the two second light source assemblies 4 is just not blocked by the cylinder 2 to be measured, and this state is that the light projected by the two second light source assemblies 4 is tangent to the cylindrical surface of the cylinder 2 to be measured.
The use principle of the positioning device in embodiment 1 of the present application is as follows:
because the included angle between the light that two second light source subassemblies 4 were thrown and the light that first light source subassembly 3 was thrown is equal, so when the plane that the light that two second light source subassemblies 4 were thrown formed jointly was parallel with the terminal surface of the cylinder 2 that awaits measuring, it explains that there is not the included angle between the light that first light source subassembly 3 was thrown and the terminal surface of the cylinder 2 that awaits measuring, and when the light that two second light source subassemblies 4 were thrown was tangent with the cylinder of the cylinder 2 that awaits measuring, the axis of the cylinder 2 that awaits measuring is just worn to establish perpendicularly by the light that first light source subassembly 3 was thrown, can rethread adjusting positioner's height, make the light that first light source subassembly 3 was thrown form the circular facula of completion on the blank, the light that first light source subassembly 3 was thrown this moment then passes through the centre of a. The two positioning devices can be used for simultaneously measuring the center of the cylinder 2 to be measured, so that the intersection point of the light rays projected by the first light source assemblies 3 of the two positioning devices is the circle center of the end face of the cylinder 2 to be measured; or the positioning device may be moved, so that the intersection point of the light rays projected by the first light source assembly 3 obtained twice is the center of the circle of the end surface of the cylinder 2 to be measured.
The positioning device of embodiment 1 of the application need not to contact with the cylinder 2 that awaits measuring, reduces positioning device's deformation and wearing and tearing, but the terminal surface centre of a circle of the major diameter cylinder of short-term determination, easy operation, and the accuracy is high, has improved the process efficiency and the precision that need confirm the terminal surface centre of a circle of major diameter cylinder greatly.
Example 2:
the basic contents of the embodiment 2 of the present application are the same as those of the embodiment 1, except that:
referring to fig. 4, the first light source assembly 3 of embodiment 2 of the present application includes a first light source 30; the second light source assembly 4 includes a second light source 40, and the second light source 40 is located below the first light source 30.
In embodiment 2 of the present application, the light projected by the first light source 30 and the light projected by the two second light sources 40 are not coplanar, and when the whiteboard is used, when the light projected by the two second light sources 40 is completely blocked by the cylinder 2 to be measured, a light spot cannot be formed on the whiteboard, and a complete circular light spot is gradually formed, or when the light projected by the two second light sources 40 is completely not blocked by the cylinder 2 to be measured, a complete circular light spot is formed on the whiteboard, and when the circular light spot just completely disappears, it indicates that the light projected by the two second light sources 40 is tangent to the cylindrical surface of the cylinder 2 to be measured. When the light projected by the first light source 30 is adjusted to form a complete circular light spot on the whiteboard, it indicates that the light projected by the first light source 30 passes through the center of the end surface of the cylinder 2 to be measured.
Example 3:
the basic contents of the embodiment 3 of the present application are the same as those of the embodiment 1, except that:
referring to fig. 5, the first light source assembly 3 of embodiment 3 of the present application includes a first light source 30; the second light source assembly 4 includes two second light sources 40, the two second light sources 40 are arranged up and down; the light rays projected by the two second light sources 40 are circumscribed, and the light rays projected by the first light source 30 and the two second light sources 40 positioned above are positioned in the same plane.
In embodiment 3 of the present application: the light rays projected by the two second light sources 40 are circumscribed to represent: the light projected by the two second light sources 40 forms a circular light spot on the whiteboard which is circumscribed. When in use, a plane formed by the two second light sources 40 and the first light source 30 which are positioned above is adjusted to be parallel to the end surface of the cylinder 2 to be measured; and then adjusting the light rays projected by the two lower second light sources 40, wherein the light rays are completely blocked by the cylinder 2 to be detected and cannot form light spots on the whiteboard, and when complete circular light spots are gradually formed, or when the light rays projected by the two lower second light sources 40 are completely not blocked by the cylinder 2 to be detected and complete circular light spots are formed on the whiteboard, and when the circular light spots just disappear completely, the light rays projected by the two lower second light sources 40 are tangent to the cylindrical surface of the cylinder 2 to be detected, so that the light rays projected by the first light source 30 pass through the circle center of the end surface of the cylinder 2 to be detected.
Example 4:
the basic contents of the embodiment 4 of the present application are the same as those of the embodiment 3, except that:
referring to fig. 6 and 7, the second light source assembly 4 of embodiment 4 of the present application further includes a third light source 41, the third light source 41 is disposed away from the first light source 30, the third light source 41 is circumscribed with the light rays projected by the second light source 40 located below, and all the light rays projected by the third light source 41 and the light rays projected by the second light source 40 located below are located in the same plane.
In embodiment 4 of the present application: the light projected by the third light source 41 and the light projected by the second light source 40 below are circumscribed to show that: the third light source 41 circumscribes the circular light spot formed on the whiteboard by the light projected by the second light source 40 located below. When in use, a plane formed by the two second light sources 40 and the first light source 30 which are positioned above is adjusted to be parallel to the end surface of the cylinder 2 to be measured; and then adjusting the light rays projected by the second light source 40 and the third light source 41 which are positioned below, wherein when the light rays projected by the second light source 40 and the third light source 41 which are positioned below are not blocked by the cylinder 2 to be detected completely, a complete circular light spot is formed on the whiteboard, and the circular light spot formed by the light rays projected by the second light source 40 which is positioned below just disappears completely, and the circular light spot formed by the light rays projected by the third light source 41 is complete circular, it is indicated that the light rays projected by the two second light sources 40 which are positioned below are just blocked by the cylindrical surface of the cylinder 2 to be detected, the light rays projected by the two third light sources 41 are not blocked and are tangent to the cylindrical surface of the cylinder 2 to be detected, and then the light rays projected by the first light source 30 pass through the center of the end surface of the cylinder.
Further, the first light source assembly 3 further includes a fourth light source 31, and the fourth light source 31 is located below the first light source 30; the fourth light source 31 is externally tangent to the light projected by the first light source 30, and the light projected by the fourth light source 31 and the two second light sources 40 located below are located in the same plane.
The fact that the fourth light source 31 is circumscribed with the light projected by the first light source 30 means that: the fourth light source 31 is circumscribed with the circular light spot formed on the whiteboard by the light projected by the first light source 30. The fourth light source 31 is used as an auxiliary light source, when the light projected by the fourth light source 31 is just blocked by the cylinder 2 to be measured, the light spot formed on the white board disappears, and the light projected by the first light source 30 is not blocked, is just tangent to the end surface of the cylinder 2 to be measured, and passes through the center of the end surface of the cylinder 2 to be measured.
Preferably, the second rod 11 is connected to the first rod 10 by a connecting rod 12. The link mechanism 1 is of a stable and simple hexagonal structure.
Further, referring to fig. 2, a mounting hole is formed in the middle of the first rod 10; the middle of the base 13 is provided with a threaded hole; the adjusting mechanism 5 is a screw rod, one end of the screw rod is rotatably arranged in the mounting hole, and the other end of the screw rod is screwed in the threaded hole and used for pushing the base 13 to move on the screw rod. The screw rod is rotated to push the base 13 to move on the screw rod, so that the included angle between the second rod piece 11 and the base 13 is adjusted.
Further, referring to fig. 3, the positioning device further includes an adjusting bracket 6, the adjusting bracket 6 includes a sleeve 60, a movable rod 61 and a fastener 62, one end of the movable rod 61 is connected with the link mechanism 1, and the other end thereof extends into the sleeve 60 and can rotate in the sleeve 60; the fastener 62 is inserted into the sleeve 60 and abuts against the movable rod 61.
The plane of the link mechanism 1 is adjusted to be parallel to the end face of the cylinder 2 to be measured by rotating the movable rod 61 in the sleeve 60. In this embodiment of the application, the movable rod 61 is connected with one of the two second rod members 11, and in the using process, the light projected by the second light source assembly 4 on the second rod member 11 connected with the movable rod 61 is adjusted to be tangent to the cylindrical surface of the cylinder 2 to be measured, and then the second rod member 11 is fixed on the tripod through the adjusting bracket 6, and the screw rod is rotated to move the other second rod member 11 with twice acceleration, so as to quickly adjust the included angle between the two second rod members 11.
Furthermore, the first light source assembly 3 is disposed on the first bar 10 or the base 13 and located at a midpoint of the first bar 10 or the base 13, so that the first light source assembly 3 projects light along a connecting line between the midpoint of the first bar 10 and the base 13.
Example 5:
referring to fig. 8 and 9, embodiment 5 of the present application provides a method for using a positioning device for the center of a large-diameter cylinder, which includes the following steps:
s1: adjusting an included angle between the second rod 11 and the base 13 so that a plane where the light rays projected by the two second light source assemblies 4 are located is parallel to the end surface of the cylinder 2 to be measured, and the light rays projected by the two second light source assemblies 4 are tangent to the cylindrical surface of the cylinder 2 to be measured;
because the contained angle between the light that two second light source subassemblies 4 were thrown and the light that first light source subassembly 3 was thrown equals, when the plane that the light that two second light source subassemblies 4 were thrown formed jointly was parallel with the terminal surface of the cylinder 2 that awaits measuring, explain that there is not contained angle between the light that first light source subassembly 3 was thrown and the terminal surface of the cylinder 2 that awaits measuring, when the light that two second light source subassemblies 4 were thrown was tangent with the cylinder of the cylinder 2 that awaits measuring in addition, the axis of the cylinder 2 that awaits measuring was worn to establish perpendicularly by the light that first light source subassembly 3 was thrown.
S2: adjusting the height of the link mechanism 1 to enable the light projected by the first light source assembly 3 to pass through the end face of the cylinder 2 to be detected;
through adjusting positioner's height, make the light that first light source subassembly 3 throws form the circular facula of completion on the blank, the centre of a circle of the terminal surface of the cylinder 2 that awaits measuring is crossed to the light that first light source subassembly 3 throws this moment then.
S3: marking the light projected by the first light source component 3 on the end surface of the cylinder 2 to be detected;
s4: and moving the positioning device, repeating the steps, and taking the intersection point of the light rays projected by the first light source component 3 marked twice as the circle center of the end surface of the cylinder 2 to be measured.
Or two positioning devices can be used to measure the center of the cylinder 2 to be measured simultaneously, so that the intersection point of the light rays projected by the first light source assemblies 3 of the two positioning devices is the center of the circle of the end surface of the cylinder 2 to be measured.
The positioner of this application embodiment 5 need not in the use with 2 contacts of cylinder that await measuring, reduces positioner's deformation and wearing and tearing, but the terminal surface centre of a circle of the major diameter cylinder of short-term determination, easy operation, the accuracy is high, has improved the process efficiency and the precision that need confirm the terminal surface centre of a circle of major diameter cylinder greatly.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A positioning device for the center of a large-diameter cylinder, characterized in that it comprises:
a linkage mechanism (1) comprising:
-a first bar (10);
-a base (13) arranged parallel to said first bar (10);
-two second bars (11), the two ends of the second bars (11) being rotatably connected to the base (13) and the first bar (10), respectively, and the included angles between the two second bars (11) and the base (13) being equal;
a first light source component (3) for projecting light along the connecting line direction of the first rod (10) and the midpoint of the base (13);
the two second light source assemblies (4) are respectively arranged on the two second rod pieces (11), and the second light source assemblies (4) are used for projecting light rays along the axial direction of the second rod pieces (11);
and the adjusting mechanism (5) is assembled on the connecting rod mechanism (1) and used for adjusting an included angle between the second rod piece (11) and the base (13) so that a plane formed by the light rays projected by the second light source component (4) is parallel to the end face of the cylinder (2) to be measured, and the light rays projected by the second light source component (4) are tangent to the cylindrical surface of the cylinder (2) to be measured.
2. The positioning device for the center of a large-diameter cylinder according to claim 1, wherein:
said first light source assembly (3) comprises a first light source (30);
the second light source assembly (4) comprises a second light source (40), the second light source (40) being located below the first light source (30).
3. The positioning device for the center of a large-diameter cylinder according to claim 1, wherein:
said first light source assembly (3) comprises a first light source (30);
the second light source assembly (4) comprises two second light sources (40), and the two second light sources (40) are arranged up and down; the light rays projected by the two second light sources (40) are circumscribed, and the light rays projected by the first light source (30) and the two second light sources (40) positioned above are positioned in the same plane.
4. The positioning device for the center of a large-diameter cylinder according to claim 3, wherein the second light source assembly (4) further comprises a third light source (41), the third light source (41) is arranged far away from the first light source (30), the third light source (41) is circumscribed to the light projected by the second light source (40) located below, and all the light projected by the third light source (41) and the light projected by the second light source (40) located below are in the same plane.
5. The positioning device for the center of a large-diameter cylinder according to claim 3 or 4, wherein the first light source assembly (3) further comprises a fourth light source (31), the fourth light source (31) being located below the first light source (30); the fourth light source (31) is circumscribed with the light projected by the first light source (30), and the projected light of the fourth light source (31) and the two second light sources (40) positioned below are positioned in the same plane.
6. The positioning device for the center of a large-diameter cylinder according to claim 1, wherein the second rod (11) is connected to the first rod (10) by a connecting rod (12).
7. The positioning device for the center of a large-diameter cylinder according to claim 1, wherein:
the middle of the first rod piece (10) is provided with a mounting hole; the middle of the base (13) is provided with a threaded hole;
the adjusting mechanism (5) is a screw rod, one end of the screw rod is rotatably arranged in the mounting hole, and the other end of the screw rod is in threaded connection with the threaded hole and is used for pushing the base (13) to move on the screw rod.
8. The positioning device for the center of a large-diameter cylinder according to claim 1, further comprising an adjustment bracket (6), wherein the adjustment bracket (6) comprises:
a sleeve (60);
one end of the movable rod (61) is connected with the connecting rod mechanism (1), and the other end of the movable rod extends into the sleeve (60) and can rotate in the sleeve (60);
and the fastener (62) is inserted into the sleeve (60) and abuts against the movable rod (61).
9. The positioning device for the center of a large-diameter cylinder according to claim 1, wherein the first light source assembly (3) is provided on the first rod (10) or the base (13).
10. A method of using the positioning device for the center of a large-diameter cylinder according to claim 1, comprising the steps of:
adjusting an included angle between the second rod (11) and the base (13) so that a plane where light rays projected by the two second light source assemblies (4) are located is parallel to the end face of the cylinder (2) to be measured, and the light rays projected by the two second light source assemblies (4) are tangent to the cylindrical surface of the cylinder (2) to be measured;
adjusting the height of the link mechanism (1) so that the light projected by the first light source assembly (3) passes through the end face of the cylinder (2) to be measured;
marking the light projected by the first light source component (3) on the end face of the cylinder (2) to be detected;
and moving the positioning device, repeating the steps, and taking the intersection point of the light rays projected by the first light source component (3) marked twice as the circle center of the end surface of the cylinder (2) to be detected.
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| CN108801138A (en) * | 2018-06-19 | 2018-11-13 | 哈尔滨工业大学 | A kind of device measuring cylindrical structure object centre coordinate using circumscribed circule method |
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| CN112372526B (en) | 2022-02-01 |
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